Iperius Backup is a free data backup software for Windows OS.

Iperius Backup is one of the best free backup software, also released in commercial editions for those who need advanced backup features for their companies. The freeware version of Iperius Backup allows you to backup to any mass storage device, such as NAS, external USB hard drives, RDX drives, and networked computers. It has comprehensive scheduling and e-mail sending functions. It supports zip compression with no size limit, incremental backup, network authentication and the execution of external scripts and programs.